bootparam.7: Remove crufty "General non-device-specific boot arguments" options

[Part of a general change to remove cruft from this page.]
Much of the detail on hardware specifics in this page dates
from the 20th century. (The last major update to this page was in
man-pages-1.14!) It's hugely out of date now (many of these
devices disappeared from the kernel years ago.)
Here, we remove some ancient x86 options.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man7/bootparam.7

@@ -123,32 +123,6 @@ does not begin with '/' or ',' or a digit, then it is prefixed by
 \&'/tftpboot/'.
 This root name is used in case of a net boot.
 .TP
-.B  "'no387'"
-(Only when
-.B CONFIG_BUGi386
-is defined.)
-Some i387 coprocessor chips have bugs that show up when used in 32 bit
-protected mode.
-For example, some of the early ULSI-387 chips would
-cause solid lockups while performing floating-point calculations.
-Using the 'no387' boot argument causes Linux to ignore the maths
-coprocessor even if you have one.
-Of course you must then have your
-kernel compiled with math emulation support!
-.TP
-.B "'no-hlt'"
-(Only when
-.B CONFIG_BUGi386
-is defined.)
-Some of the early i486DX-100 chips have a problem with the 'hlt'
-instruction, in that they can't reliably return to operating mode
-after this instruction is used.
-Using the 'no-hlt' instruction tells
-Linux to just run an infinite loop when there is nothing else to do,
-and to not halt the CPU.
-This allows people with these broken chips
-to use Linux.
-.TP
 .B "'root=...'"
 This argument tells the kernel what device is to be used as the root
 filesystem while booting.